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GIF to ICO Converter

GIF is limited to 256 colours; converting a static GIF gives smaller, better-looking files. Converting to Windows ICO icons gives you the icon format browsers look for at /favicon.ico and Windows uses for shortcuts. The palette is the whole problem. A photograph forced into 256 colours gains visible banding across skies and skin tones, and dithering to hide it adds noise that then compresses badly — so a photographic GIF is both worse-looking and larger than it needs to be. Website favicons and Windows shortcut icons — a square source with clear shapes that still read at 16 pixels. Drop your files below and the work happens on your own machine: the conversion runs in the browser through the Canvas API, so nothing is uploaded, there is no file-size cap, no watermark and no sign-up. Batches are fine — drop a folder's worth and take them back as a single ZIP.

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What a GIF file actually is

GIF dates to 1987 and stores at most 256 colours from a palette, compressed losslessly with LZW. Transparency is a single on/off flag on one palette entry rather than a real alpha channel, which is why GIF edges against a coloured background look jagged.

GIFs come from the reaction-image corner of the internet, from old web assets, and from screen recorders that default to it. Anything animated and low-colour that has been passed around for years is probably still a GIF.

What you get from ICO

ICO is a container that holds one or more small square images, with transparency, for use as an icon. It caps out at 256×256 — anything larger has to be scaled down, and the format is not intended for general pictures.

Every browser requests /favicon.ico by default, with no HTML required, and Windows uses ICO for application and shortcut icons. It is a narrow format that is completely reliable inside its niche.

What changes when you convert GIF to ICO

Both formats are lossless, so nothing is thrown away in either direction — this is a container change rather than a quality decision. What differs is how efficiently each one packs the same pixels, and how widely each is supported by the software you need to open it in.

Transparency technically survives, but it improves on the way. GIF has no alpha channel — just one palette entry flagged as transparent — which is why GIF cut-outs have hard, jagged edges. ICO stores a full 8-bit alpha, so anything you composite afterwards can have genuinely smooth edges, even though the original's jaggedness is baked in.

Only the first frame survives. GIF is the one source here that can be animated, and ICO output is a still image, so an animated GIF converts to its opening frame. The upside for static GIFs is real: escaping the 256-colour palette removes the banding, and the file usually gets smaller at the same time.

ICO cannot exceed 256×256, so anything larger is scaled down to fit while keeping its aspect ratio. Work from a square source if you can — a wide image gets letterboxed into the square, and fine detail disappears entirely at the 16-pixel size a browser tab actually renders.

An old GIF is a plausible icon source precisely because it is already small and low-colour. The catch is the hard-edged transparency: GIF's single transparent colour leaves jagged edges that become obvious once the icon sits on a dark background.

Frequently asked questions

Is this GIF to ICO converter really free and private?

Yes. Conversion happens entirely in your browser using the Canvas API — your GIF images are never uploaded to a server, there is no file limit, no watermark and no sign-up.

Can I convert multiple GIF files at once?

Yes — drop any number of files and they convert in one batch. Use "Download all" to save the results as a single ZIP.

What size will my ICO file be?

ICO cannot store an image larger than 256×256, so anything bigger is scaled down to fit while keeping its aspect ratio. For a browser favicon a square source works best — 256×256 covers every modern use, and browsers scale it down to the 16 or 32 pixel tab icon themselves.

How do I use this as my website favicon?

Save the file as favicon.ico in your site's root directory. Browsers request /favicon.ico automatically, so no HTML is strictly needed — though adding <link rel="icon" href="/favicon.ico"> makes it explicit.

Will an animated GIF stay animated?

No — ICO output is a still image, so only the first frame is kept. For animations, keep the GIF or use a video format.

Does converting GIF to ICO lose quality?

Both formats are lossless, so nothing is thrown away in either direction — this is a container change rather than a quality decision. What differs is how efficiently each one packs the same pixels, and how widely each is supported by the software you need to open it in.

Should the icon be square?

Yes. ICO holds square images, so a wide or tall source is fitted into the square and ends up with empty space around it. Start from a square design with generous margins — the tab icon renders at 16 pixels, where anything intricate turns to mush.

Why does my GIF photo look banded?

GIF stores at most 256 colours, and a photograph needs far more, so smooth gradients break into visible steps. Converting to any modern format removes the ceiling — which is why static photographic GIFs almost always improve.

Related conversions

JPG → ICOPNG → ICOWebP → ICOHEIC → ICOAVIF → ICOGIF → JPG

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